Post on 02-Jun-2018
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Fun with Dry Ice!!!
Demonstration by:
Jon WilsonThe University of Mississippi
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History of Carbon Dioxide
Who do we owe credit for Dry Ice?
A Chemist from Belgium named Jan Baptist
van Helmont (1580-1644)discovered CarbonDioxide in the early 1600s.
He was also the first person to use the word
gases when dealing with Carbon Dioxide and
other common gases (example: Oxygen)
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Jan Baptist van Helmont
(1580-1644)
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History of Carbon Dioxide
Carbon Dioxide in the past
It is thought that Carbon Dioxide dominated the
Earths atmosphere 4.5 billion (4,500,000,000)years ago.
Living on Earth during that time would have
been impossible because there was not enough
Oxygen for us to breathe. The atmosphere wassimilar to the current atmosphere on Mars.
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Earths Atmosphere 4.5 billion
years ago?
Mars Venus
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Properties of Dry Ice
Temperature
-109 degrees Fahrenheit (-80 degrees Celsius)
That is 150 degrees colder than it is outside
right now (it is around 41 degrees F in Oxford)
Density
Heavier density than the air around us.
Special Property
Goes directly from a solid to a gas (called
sublimation) under normal temperatures. It
does not leave a puddle of ice like regular ice.
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Common Uses of
Dry Ice(Solid - CO2)By plants for photosynthesis (most
important)
Freezing different things for transportKeeping different things frozen during
transport
Adding carbonation to our sodaFire extinguishers
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Carbon Dioxide vs. Water
CO2 It has a greater density
than Water.
It goes directly from a
solid to a gas under
normal temperatures.
Vital for
photosynthesis inplants.
H20
It has a density less
than Carbon Dioxide.
It goes from a solid to
a liquid to a gas under
normal temperatures.
Everyone needs water
to survive.
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Playing It Safe with Dry Ice
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What Do You Think?
Why does the Ice Cream man use Dry Ice
instead of regular Ice?
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What happened and Why
The ice cream man uses dry ice because
when it melts there is not a puddle of water.
Dry ice turns directly into a gas. This doesnot make a mess or make your ice cream
soggy on summer days.
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What Do You Think?
What will happen when an air filled
balloon is placed into the aquarium with dry
ice?Will the balloon be crushed?
Will the balloon sink to the bottom?
Will the balloon float out of the aquariummagically?
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What happened and Why
Carbon Dioxide gas has a higher density
than air. The carbon dioxide gas fills the
aquarium from the bottom to the top as itturns from a solid into a gas. The air filled
balloon floats on the Carbon Dioxide gas
because it is less dense. Depending on the
amount of Carbon Dioxide in the aquarium,
the balloon will either float inside or be
pushed out over the top.
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What Do You Think?
What will happen when regular air filled
soap bubbles are blown into the aquarium
with the dry ice?Will the bubbles freeze?
Will the bubbles change colors?
Will the bubbles float like the balloon in theearlier experiment?
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What happened and Why
Since the air filled soap bubbles have a
density less than the carbon dioxide gas,
they float on the Carbon Dioxide gas aswell. Like the balloon in the first
experiment, some of these bubbles might
also be pushed over the top out of the
aquarium.
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What Do You Think?
What will happen when dry ice and water
are placed into one of the small film cans?
Will the can crack open violently?Will the can just sit there and look boring?
Will the can deform?
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What happened and Why
When water is added to dry ice, it
sublimates or changes from a solid to a gas
much more quickly. If you seal them upinside the container, the pressure of the
carbon dioxide gas builds up and pops the
top off the can. It is important not to seal
dry ice in an air tight container!!!
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What Do You Think?
What will happen when 4 candles at
different heights are lit in the aquarium with
the dry ice?Will they all be put out by the dry ice?
Will they keep burning until there is no more
candle left?
Will they make sparks and really big flames?
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What happened and Why
Fire needs oxygen to burn much like
humans need oxygen to breathe. Carbon
dioxide smothers the oxygen, extinguishingthe candles flame.
Carbon dioxide is used in fire extinguishers.
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Deadly Carbon Dioxide
Lake Nyos, Cameroon
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What happened and Why
This volcano in Cameroon, a country in
Africa, has a lake sitting inside of it. Some
slight activity occurred in 1984 and 1986releasing a Carbon dioxide gas bubble from
within the lake. Since the gas is heavier
than air, it rolled down the sides of the
volcano like fog into the surrounding
village. Lots of people and animals died
from suffocation.
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Conclusions About Dry Ice
Dry Ice is fun
Dry Ice is used any many ways to keep
things frozen and cold for transportDry Ice is a substance that goes directly
from a solid to a gas under normal
temperatures and pressureCarbon Dioxide is important to our lives
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Materials
Materials
aquarium (10 gallon)
50 lb block of dry ice
thick rubber gloves
tongs
candles
lighter latex gloves
metal spoon
soap bubbles
plastic volcano
lighter with long flame
styrophone cups
water and container
cooler for dry ice
Powerpoint slides Dry Ice write-ups
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References
Web References
http://www.dryiceinfo.com/
http://www.gomilpitas.com/homeschooling/explore
chemistry.htm http://oror.essortment.com/dryiceprojects_opl.htm
http://ousd.k12.ca.us/~codypren/4f.html
http://www.howstuffworks.com/question264.htm
http://www.rockitscience.com/dryice.html
http://www.geocities.com/Heartland/Ranch/8785/exp1.html
http://www.geocities.com/Heartland/Ranch/8785/exp2.html
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Literature
Literature
Good Web Resources
DryIceInfo.com Howstuffworks.com
Good Fun Demo Book
Title: Dry Ice Investigations
ISBN: 0924886153Price: $15.64 @ booksamillion
For: Grades 6-8
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Getting Dry Ice
Local Contact Information
Nex-Air of Batesvi l le, MS
Phone: (662) 563-8613 Oxford Delivery Driver: Mr. Tony Arnold
Call on Wednesday to reserve a block (usually only
one block can be reserved from the shipment)
Delivery comes every Thursday and blocks can bepicked up late Thursday or early Friday
Price per block = ~$16.00
Always very helpful people for teachers!
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Images
Images to be added later!